<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>module</title>
    <script src="./module.js"></script>
</head>

<body>
</body>
<script>
    window.onload = function() {
        Module.toUpper();
        Module.toLower();
    }
</script>

</html>